A 5-1 aggregate defeat to Denmark in the World Cup 2018 play-off has triggered a monumental slide, with just one win in 11 games.

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O'neill's reign lasted five years [Courtesy]

Not only did Ireland fail to score in the friendly vs Northern Ireland last week and the Nations League clash vs Denmark, but they also failed to register a shot on target in the latter.

FAI President Donal Conway said: “On behalf of the FAI Board, I would like to thank Martin, Roy, and the management team for their work with the Republic of Ireland team over the last five years.

“Martin ensured that we enjoyed some great nights in the Aviva Stadium and on the road in Lille, Vienna, and Cardiff, which were fantastic high points for Irish football.”

Whilst Delaney paid tribute to O'Neill and his contribution: “I would like to thank Martin, Roy, and the management team for the impact that they had with the Ireland team.

"There have been many highlights during Martin’s reign – none more so than EURO 2016 in France, which will live long in the memory of all Irish supporters.

“Martin did a great job guiding the team out of a difficult qualifying group – where we beat World Champions Germany along the way – to reach EURO 2016 and advance to the Last-16 following a historic victory over Italy in Lille. I wish Martin, and the management team, the very best for the future.”